The Doctor tracks the Master down to the Newton Institute. There, after a disastrous attempt to summon Kronos, the Master prepares to use TOMTIT again.
| Name | Type | Role | |
|---|---|---|---|
| Robert Sloman, Barry Letts | Writer | ||
| Keith Dalton | Guest Star | ||
| John Wyse | Guest Star | ||
| Aidan Murphy | Guest Star | ||
| Paul Bernard | Director |